Dougherty was among several officers who surrounded Miessau's home in a three-hour standoff on Feb. 21 after Miessau's daughter reported that he was armed and suicidal. He also threatened to shoot "police cars and anyone in them," the report said.

Miessau fired several shots out the window, then came out of the house and aimed his long rifle at the police perimeter, according to Connelly's report. Dougherty fired one shot, which struck Miessau in the chest and killed him almost instantly, the report concluded.

Police later found a shotgun, rifle and ammunition near Miessau's body.

Connelly's report closes the investigation into the incident, and no further action is expected.

Miessau had a criminal record with one conviction. In 1998, he pleaded guilty to creating a public disturbance and paid a fine. Police said he told a worker at the state Motor Vehicles Department in Waterbury, "If I don't get what I want, you're gonna get a bullet."